// Copyright 2016-2019 DutchSec (https://dutchsec.com/)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ssh

import (
	"github.com/honeytrap/honeytrap/storage"
)

func getStorage() (*sshStorage, error) {
	s, err := storage.Namespace("ssh")
	if err != nil {
		return nil, err
	}
	return &sshStorage{s}, nil
}

type sshStorage struct {
	storage.Storage
}

func (s *sshStorage) PrivateKey() *privateKey {
	if keyBytes, err := s.Get("private-key"); err == nil {
		return makePrivateKey(keyBytes)
	}

	log.Debugf("Could not load private-key, generating one.")

	keyBytes, err := generateKey()
	if err != nil {
		log.Errorf("Could not generate ssh key: %s", err.Error())
		return nil
	}
	err = s.Set("private-key", keyBytes)
	if err != nil {
		log.Errorf("Could not persist ssh key: %s", err.Error())
		return nil
	}

	return makePrivateKey(keyBytes)
}
